My great-grandfather seems to have high dark boots, a belt around his bellybutton line and I can only see 4 buttons on his uniform but I assume there's a 5th one behind his hand. There are two pockets on the chest with one button for each pocket and in the middle, there's a bulge. And two kind-of baggy pockets below the belt. Now I can't really see what kind of hat he is wearing i know it's not that tall in height and the thing that blocks the sun is kind of long. And he most likely served in the calvary. If you have any idea what country it's from I'd be really grateful!
Hello there! As your question is related to looking for identification/information regarding military personnel, our Guide on Military Identification may be of use to you. It provides a number of different resources, including how to request service records from a number of national agencies around the world, as well as graphical aids to assist in deciphering rank, unit, and other forms of badges or insignia. While the users here may still be able to lend you more assistance, hopefully this will provide a good place to start!